Window lock



Dec. 6, 1949 s. BEDER 2,490,197

WINDOW LOCK Filed Feb. 18, 1947 2 Sheets-Sheet l FIG. 6

INVENTOR Dec. 6, 1949 s. BEDER 2,490,197

WINDOW LOCK Filed Feb. 1s, 1947 2 Sheets-Sheet 2 FIG. 10

INVENTOR Patented Dec. 6, 1 949 WINDOW LOCK Samuel L. Beder, New York, N. Y., assignor to Irwin F. Mills Associates, New York, N. Y.

Application February 18, 1947, Serial No. 729,349

7 Claims.

The present invention relates to improvements in looking mechanisms for windows and the like, and more particularly to improvements effected in a locking mechanism disclosed in my co-pending application Serial No. 633,135 filed December 6, 1945, now abandoned.

It is proposed in the present improvement to provide a type of locking mechanism that is capable of being operated to look a window by the act of closing the window. The type of window referred to herein at all times is the type known as double hung.

It is a principal object of the instant invention to provide a lock mechanism capable of operating as a locking member for double hung windows, being actuated by the act of closing the window, and which while in unlocked position on an open window will still act when the window is closed even though manual operation of the locking mechanism has been first effected.

It is a further object of this invention to provide a locking mechanism for windows, which can not easily be jimmied open from the outside.

To carry out the foregoing purpose I provide certain new details of construction and operating mechanism, as will be disclosed and explained in this specification and the accompanying drawmgs.

Referring now to the drawings which are merely illustrative of my invention, I disclose all the parts thereof. Similar reference characters designate similar parts throughout the respective views.

Figure 1 is a longitudinal sectional elevation of the locking mechanism and associated keeper.

Figure 2 is a sectional view taken through the locking mechanism.

Figure 3 is a front elevation of the lock case.

Figure 4 is a rear end elevation of the lock case.

Figure 5 is a top plan view of the lock case.

Figure 6 is a bottom plan view of the latching member.

Figure '7 is a bottom plan view of the plunger.

Figure 8 is an end view of the plunger, and

Figure 9 is a side View of the plunger.

Figure 10 is a sectional elevation of the locking mechanism shown in place on a window in looking position.

Figure 11 is a side elevation of the keeper and lock case properly lined up in position.

In Figure l is shown the keeper l0 and the lock case I aligned on a closed double hung window, the keeper being fastened securely to the bottom of the lower half of the window, and the look case fastened securely to the upper part of the lower half of the window. The keeper H! has skirting outwardly turned base flanges IS in which holding screws are inserted for fastening, and the lock case I I has two flanges I9, 20, made by bending the side walls I'd-l8 outwardly. In these flanges are shown holes 39 for the fastening screws.

The keeper, in the embodiment shown is made from a sheet metal blank, stamped, and bent at right angles to form parallel side walls 12, I3, a top [4, the flanges l5, rounded out in the same manner shown in connection with the base flanges l9 and 2B of the lock casing as shown at 3!] in Figure 3, and a back also designated It. The lock case is also made from a sheet metal blank stamped to form at right angles to the top It, two parallel side walls ll, l8, closing end walls 2i, 22, 26, 21 arranged in pairs at each end of the lock case, as in Figures 3 and l.

It will be seen that end walls 2|, 22 do not have abutting vertical edges but are spaced apart to provide at the front of the lock case a narrow vertical slot 23. These walls are further cut away to provide at their upper plane, a wide rectangular slot 23a. The walls 26 and 2! do have abutting edges receding from the top of the lock case, which are formed at their bottom plane with a wide rectangular slot 31, centrally. It will be seen from Figures 3 and 4 that the base flanges l9 and 20 of the lock casing have rounded rims 3B, and that the end walls at the opposite ends of the lock casing extend downwardly so as to coincide with the rims of these flanges for the purpose of closing opposite ends of the casing where otherwise left open by these flanges. The end walls may be chamfered out as at 24 for the purpose of receiving in countersunk soldered or welded relation a bottom plate 24a which forms a rigid bottom for this look casing. Formed integrally upon either wall ll or is is a shelf or guide plate 25 which extends longitudinally of the case at the upper end of slot 23, the full width of slot 23 into the case. The bottom plate 24a closes the bottom plane of the slit 23 as well as of the wider slot 3|.

A latching member 32 is shown in Figures 1 and 6. It is stamped out of sheet metal and bent with rightangular integral portions on its narrow base 36 to provide parallel upstanding side walls 34, 35. The base 36 is inclined obliquely at 33 by a bent back part which forms one end wall of the latching member; the side walls 3d, 35 project beyond the opposite end of the base 36, where they are clinched together laterally to form a projection. This offsets into a central abutting pair of ears 31, 38, which together form a lug as shown in Figure 6. The base of the latch 36 is formed with an indentation 40. A coiled Spring 13a embraces at one end a lug 38a formed in case ll (Figure 1) and this spring at its other end embraces the lug formed by the ears 3?, 38. The base 33 of the latching member 32 is slidably supported on the guide plate 25 at one end. To support the other end slidably the latching member 32 carries a pin 42 which projects freely into the upper forked end 44 of an oscillatable lever 43, which is pivoted on fixed pins 43, mounted in the side walls ll, l8 of the case H. The lower forked end 45 of the'lever 43 has a pin 41 projecting freely into it. This pin 4'! is carried by the side of the plunger 43 shown in Figures 1, 8, 9. The plunger 48 is a sheet metal body having parallel upwardly extending sides closed at the back by an integral wall 59 which curves down and around and forms a rear bottom plate 49. Connected across the side walls of this plunger at its extreme front is a, ledge 55, and between this ledge and bottom plate 49 is a bottom slot l'a in the plunger, while 5i designates in Figure 8 the channel in the plunger which is open in its front. I provide a dog 59 which is eccentrically pivoted at 58 between the side walls of the plunger in a zone where these side walls project upwardly above the major portion of the plunger length to provide a pair of upstanding oppositely arranged lugs 54 and 54a.

This dog 59 has an elongated body in front of its pivotal connection 58, which terminates in a curved nose Bl which meets the bottom surface 62 of the dog. The bottom surface 62 of the dog rests upon the ledge 55 of the plunger, while the rear body portion 69 of this dog 59 has the form of a boss which projects down into slot 51a of the plunger. I provide a bowed arched leaf spring 63 the opposite ends of which rest upon the bottom plate 24a of the lock case. In Figure 1 it will be seen that this bowed spring 63 reaches slot 51a of the plunger, and at a point below its crest bears against the curved boss 69 of the against the ledge "55 of the plunger and, at the same time, pressing upwardly the lugs 54, 54a so they project above'shelf 25 upon which the latching member 3; slides. Hence if this latching member slides over the lugs, except at the point where its bottom recess 49 is located, it will depress the lugs and the plunger against the tension of bowed spring 63,'whic h action is disclosed in Figure 2. But when its recess comes directly under the lugs, the latter will project thereunto and hold the bolt retracted completely in the lock case as is shown in Figure l. The straight opposite end 64 of the plunger is slidably guided in slot 3!, and the plunger rests, supportingly on said bowed leaf spring 63, set into the bottom of this case H. The plunger is held in place by the spring to allow it to clear slot 3|, and clearance is allowed for the lip 6! in slot 23. In the upper portion of the keeper I9, is dog 66 eccentrically pivoted on the pin 65 whieh is held in place by the side walls l 2, l3. This dog when actuated by the point of the latch 32, as it'is driven home into the keeper, provides an anti-jim'mying feature which will be explained hereinafter.

The operation of the window lock is as follows: When the lock is in the position shown in Fig- 4 ure 2 it is in locked position but in Figure 1 the parts of the locking mechanism are in operating position so that the window is in an unlocked position also. The upper sash can be moved down and the lower sash moved upwardly.

To open from locked position the plunger 48 is pushed inwards by pressing on its exposed end 64. As the plunger moves inward the pin 4! urges the lever 43 to turn on its axis, the upper forked end of the lever, being engaged with the pin 42 in the latching member the backward travel of the top of the lever forces the latching member 32 backwards. This removes the latching member end from the keeper and the window can now be opened.

As latch 32 is retracted into the lock casing it is held in this position because the indentation 49 in latch 32, is also moved backward to a position where the lugs 54b, 540 on the plunger 48, snap into place in indentation 4t, and keep the latch in fixed position.

The leaf spring 63 is now in fully bowed position, and pressing against the bottom of the plunger 48, it holds the lugs 54, 54a in position in indentation 49. The movement inwards of the plunger pushes the dog 59 in the same direction and the lip SI of the dog projects freely beyond the lock case into the keeper. As the latch 32 is retracted thus inside of the lock case it compresses and tensions coil spring I3a. Since the latch no longer engages the keeper I4 which is attached to the bottom of the upper window sash this upper sash may now be let down to open position. As this window moves downwardly the top part of its keeper I 4 will strike lip 6| of the dog forcibly, which action presses the dog downwardly swinging it upon pivot pin 58, depressing and flattening out, at the same time, leaf spring 53 and pulling down on lugs 54 and 54a of the plunger 48. This has the eifect of disengaging these lugs out of the indentation 49 of the latch. The latch 32 is now completely free to make a forward thrust, urged on by coil spring l3a which now expands and relaxes. The moment the keeper has descended below the lip 6| of the dog 59, which it tripped and passed, the latch projects forwardly of lock case again as is shown in Figure 2. The action is similar if the lower sash holding the lock case is raised as the lip of the dog will also clear the keeper. In either case when the top of the keeper contacts the lip of the dog thelatching member 32 is above the keeper.

The intent is that when this happens the latching member 32 instead of remaining in fixed position be set, automatically, in projecting position movably, for locking.

The act of closing the window and bringing the keeper IE and lock case H into horizontal alignment a s the ten of he k eper to c nta the be ed n 3 Of t e lamb 32 fo c n t b into the lock case until it clears the top of the keeper whereupon the upward pressure of the bowed spring 63. and the tension on coil spring |3a forces the latch 32 intothe keeper in locking position. While this is taking place the indentation 40 does not en a e, lu s 54b. 54c- The dog 59 pivoting both up and down prevents the damaging action that .would occur if the dog was omitted and the projection 61 was an integral part of the plunger 48; Should a person manually operate the mechanism by pressing the plunger 48 inwardly while the window was in open position, my device will operate and automatical- '5 1y lock the window without damaging the mechanism.

In Figures 2 and I show a jack 6B pivoted eccentrically upon a cross pin 65 mounted inside of keeper I4. The heft of the outer part of this jack is such that, normally, in the position this jack is shown to occupy in Figure 10 the jack is perpendicularly disposed. The outer part of this jack, as shown, forms an obtuse angle with respect to the inner part thereof. In this upright position, the jack 66 is completely enclosed in the keeper. In this position the upper lever end of the jack extends into the upper end of the hollow interior of the keeper and here it is in line with the longitudinal axis of latch 32. As this latchis rendered free to make a thrust into the keeper, it will be seen that it will strike the upper lever end of jack B6 in doing so will rock this jack on pivot pin 65 as shown in Figure 2, thereby moving the outer part of this jack outwardly of the keeper so it bridges the slit 61 which may intervene between the confronting surfaces of the keeper and lock case. Being thus under the operated latch 32, it follows that should any instrument nefariously be inserted in this slit 61, it

cannot contact latch 32 for the purpose of retracting it out of the keeper. Instead it will first engage the jack 66, but any upward pressure exerted against this part by said instrument causes the inner part of the jack to impinge against the back wall of the keeper M which results in the jack bein made stationarily rigid and immovable.

There is thus provided a fool-proof self-locking mechanism for locking windows by the act of closing them.

Having thus described my invention what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a device as described a lock case having a vertical elongated slot at its front and a wider, shorter slot at its back, a bowed leaf spring resting on the bottom of said case, a plunger disposed longitudinally in the bottom of said case with its bottom surmounting the bowed spring by virtue of which it is raised above the bottom plane of both said slots, while projecting with one end through the wider slot, a dog eccentrically pivoted to the free end of said plunger, in said case, having a lip projecting freely out of the vertical elongated slot, said dog also bearing supportedly upon said. bowed spring, said plunger having a shoulder upon which said lip rests in down position, an upwardly extending lug carried by said plunger, and a reciprocatable latching member working in the upper part of said case having a recess into which the lug of the plunger is pressed by said bow spring in order to cause said lug to hold the latch encased in said case inoperatively, and means connecting said latch and said plunger for movements in opposite directions, whereby either the latch or said dog projects outside said case while the other projects inside.

2. In combination a lock case, a bowed spring resting on its bottom, a plunger extending longitudinally in said case resting slidably upon said bowed spring, said case on its rear wall having a slot through which said plunger pushably extends, a pin on said plunger, an oscillating lever pivoted in said case and having bifurcated upper and lower ends in the lower one of which said pin projects, a latching member guided for reciprocating movement in the upper part of said case, and having bottom recess, lugs extending upwardly from said plunger, being held pressed into said recess by said bowed spring. a dog pivoted onto said plunger having a lip, said case being formed on its front wall with a slot through which said dog projects and in which it may tilt, said dog also resting upon said bowed spring, a pin on said latching member projecting into the upper bifurcated end of said oscillating lever, and a spring coiled around a part of said member and engaging the back wall of the case, said latching member being retracted into said case against the tension of said coiled spring bysaid lever as the plunger is thrust forwardly to project said dog out of the case and to allow said lugs to enter said recess.

3. In a device as described, a lock case formed with slots respectively in its front and back walls, a latching member slidably guided at the top of said case, a spring engaging the back wall of said case as well as said latching member, said member formed with a bottom face recess, a

bowed spring on the bottom of said case, a

plunger resting on said bowed spring and having I an intermediate lug extending upwardly and constrained, under influence of said bowed spring to enter said recess of said member to hold the latter retracted into said case, pins carried respectively by said member and said plunger, an oscillatable lever fixedly pivoted in said case between said latching member and plunger and engageable connectably with both of said pins at opposite ends, the back wall slot receiving the plunger in slidable relation, a dog pivoted to said plunger and having a lip projectable freely through the front wall slot, a shoulder on said plunger, said dog at the same time resting upon the bowed spring and shoulder so that when the 11p is engaged forcibly upon its upper side and thrust downwardly the dog presses down on said shoulder in order to disengage the lug from said member recess, thereby causing said first-named spring to thrust said latching member out of said case, which movement tilts the oscillatable lever and retracts the dog into the case.

4. As a new article of manufacture a sheet metal blank bent into inverted U formation of rectangular shape with rightangularly bent back closing end walls extending vertically of said U formation and with oppositely arrayed outturned base flanges formed longitudinally on both sides of said structure, the closing walls on the rear of said structure abutting but being cut away at the lower plane to form a wide slot, while the closing walls at the front of said structure have spaced edges to provide therebetween a lower elongated vertical slot, the edges being spaced apart a greater distance at their upper portions to form a wider slot, an integral shelf extending into said vertical slot, and a bottom plate closing the open bottom of said U formation.

5. As a new article of manufacture a plunger member made from a sheet metal blank having a narrow short base plate and rightangular upset opposing parallel walls skirting same but projecting beyond said plate and formed terminally with a closing integral end wall, the parallel walls being formed with similarly shaped upstanding integral lugs in a plane at right angles to the length of said member, there being a base plate joining said parallel walls and secured to said integral end wall.

6. In a device as described, in combination, a keeper and a confronting lock case, a latch bolt slidably guided in and out of said case, a lever pivoted eccentrically in said keeper its outer portion being adapted to drop by gravity and disposed at an obtuse angle with respect to the latter, the front face 'or'saiu bolt 'biiig'b'evel'd, 'a spring 'in said case "'expandably thrusting said bolt into said keeper, thereby causing'the'beve'led end of said bolt toeng'ag'e the inner portion of said lever forcing it to incline in abutting relation against the back wall of saidfkeeper an'd lifting the outer portion thereof under and in contact with said boltand means forr'et'ainedly retracting said bolt inside of the case against the tension of said spring, whereby the lever will drop down into vertical position 'in'sa'id keeper by gravity.

7. A device as described consisting of a lock case having a longitudinally guided latch bolt with a bottom recess, "a vertically "disposed 'oscillatable lever pivotally engaging at one end said'bolta longitudinally'traversable hand pushable plunger having an intermediate pin with which the lower end of said lever engages in a pivotal relation to the'pluifg'en'a slot being chanineled out of the plunger andthe latter, thereover,

having upwardly projecting lugs and a ledge in advance of said channel, a dog os'cillatable in said channel having a front nose projecting beyond said plunger and a rear rounded boss extending into said slot, a coil spring centered against the back wall' of said case-and against vthe rear end of said bolt, and a bowed spring resting on the case bottom and bearing against the boss of said 'dog to'press the latter down on saidledge and to press said lugs into the recess of the bolt the arrangement being such that, when the nose of the dog is depressed forcibly,.it bears downwardly upon said ledge, thereby retracting said lugs out of the bolt recess socthat the coiled spring ejects the bolt from the lock case.

SAMUEL L. BEDER.

I REFERENCES CITED The following references are of record in the ille of this patent: 

